Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENT - Narrative (Details)

v3.19.3
FAIR VALUE MEASUREMENT - Narrative (Details)
$ in Millions
9 Months Ended
Sep. 20, 2018
Jul. 03, 2018
USD ($)
earnout_payment
Sep. 30, 2019
USD ($)
Fair Value, Measurements, Nonrecurring      
Schedule of Equity Method Investments [Line Items]      
Assets, fair value     $ 1,300.0
Minimum      
Schedule of Equity Method Investments [Line Items]      
Broker price discount     10.00%
Maximum      
Schedule of Equity Method Investments [Line Items]      
Broker price discount     25.00%
Residential Mortgage Loans | Fair Value, Measurements, Nonrecurring      
Schedule of Equity Method Investments [Line Items]      
Assets, fair value     $ 1,236.5
Real Estate Acquired in Satisfaction of Debt | Fair Value, Measurements, Nonrecurring      
Schedule of Equity Method Investments [Line Items]      
Assets, fair value     51.8
Loans Held-for-sale and Held-for-investment      
Schedule of Equity Method Investments [Line Items]      
Asset fair value adjustment     17.0
Real Estate Owned      
Schedule of Equity Method Investments [Line Items]      
Asset fair value adjustment     $ 0.4
Mortgage Servicing Rights Financing Receivable      
Schedule of Equity Method Investments [Line Items]      
Discount rate     8.80%
MSRs      
Schedule of Equity Method Investments [Line Items]      
Discount rate     7.50%
MSRs | Excess MSRs Investees      
Schedule of Equity Method Investments [Line Items]      
Discount rate     7.80%
London Interbank Offered Rate (LIBOR) | Mortgage Servicing Rights Financing Receivable      
Schedule of Equity Method Investments [Line Items]      
Variable interest rate spread     0.90%
Shellpoint Acquisition      
Schedule of Equity Method Investments [Line Items]      
Cash earnout payments | earnout_payment   3  
Contingent consideration   $ 60.0  
Cash consideration transferred   212.3  
Contingent consideration, discount rate 11.00%    
Shellpoint Acquisition | Maximum      
Schedule of Equity Method Investments [Line Items]      
Contingent consideration   $ 60.0